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S&W M&P22 18+1 Round Magazine Kit

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This magazine upgrade you will get additional rounds in the factory 10 and 12 round mags. These modifications are not permanent and easily install in minutes. This upgrade will increase your Smith & Wesson M&P 22 pistol magazine's capacity from the factory 10rd or 12rd magazines to 18 rounds. With one (1) in the chamber and 18 in the magazine, that's 19 rounds in the gun! The kit consists of magazine spring, Hi-Viz NicTaylor follower, black anodized aluminum basepad and hex wrench. This kit is NOT for the COMPACT M&P22. If you have the Compact pistol you can get the 16+1 Mag kit HERE

Please note you will not use the metal pin found in the factory follower. Most people use this pin to aid in loading the magazine. If you have the need for a load assist tool we have two options for you. The first uses the hole in the blue follower to push the follower down. You can find it HERE. The second works more like a traditional magazine loader and can be found HERE

We recommend using high velocity ammo for this kit. With so many rounds in the magazine, there is more pressure exerted on the bottom of the slide. This pressure is difficult to overcome as the slide attempts to cycle with the use of some low power ammo. Even with high velocity ammo, the slide may not lock back every time on the last shot fired.
International Orders Click HERE
MSRP: $33.95
Our Price: $27.95
Sale Price: $25.95
Savings: $8.00

Shipping: Usually Ships in 1 to 2 Business Days
Part #: 200-18RD-MP22

Installation Instructions RESTRICTIONS

1) Remove factory basepad and retainer plate.

2) Remove magazine spring and slide factory follower down to base of magazine so that the load assist pin can be removed from the follower.

3) Remove factory follower.

4) Insert HiCap follower into the magazine body.

5) Insert magazine spring into magazine body.

6) Compress spring into magazine body and slide on the aluminum basepad. Assure that the spring is in the pocket of the basepad.

7) Finger tighten set screw with the included hex wrench.

Smith & Wesson M&P22 High Capacity Magazine Kit Installation Instructions

Average Rating: Average Rating: 5 of 5 5 of 5 Total Reviews: 13 Write a review »

  0 of 0 people found the following review helpful:
5 of 5 Parts and pieces January 9, 2024
Reviewer: Adam from MT United States  
I have enjoyed my experience with this company.   Product is pretty good.   Quality company and product

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  0 of 0 people found the following review helpful:
5 of 5 18 round magazine kit January 17, 2023
Reviewer: Joseph Flora from Murrell's inlet , SC United States  
Fantastic product.fit perfectly and works great.look good too

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  0 of 0 people found the following review helpful:
5 of 5 S&W M&P22 18+1 Round Magazine Kit December 19, 2022
Reviewer: Sam Chandler from Winchester, VA United States  
Super easy to install and makes range days a bit easier.

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  0 of 0 people found the following review helpful:
4 of 5 Easy to install November 16, 2022
Reviewer: J Lee from Columbia Heights, MN United States  
I got (2) 18+1 kits, a new recoil spring, & thumb loader.
18+1 rds? I can do 17. I load 15 when shooting.
Mag 1 had (3) FTFs, Mag 2 had (5) of 200 rnds is OK bc clearing malfunctions is good to practice.
It'll feed & load better once the springs relax.
The mag loader helps! The mags need to be modified w/ a Dremel tool to expand & elongate the opening for the mag loader to work best.
Overall, I am satisfied bc it's tough to find any parts for this old firearm.
I'm wishing for a new firing pin spring & extractor spring, or kit that has all the tiny slide & the lower receiver parts - I've looked at Wolff Springs & Walther's websites... May have to cannibalize a Walther P22Q - the build is nearly identical to the M&P22 FS (*full size).
Thanks for making these parts so I can enjoy this great .22lr!!!

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  0 of 0 people found the following review helpful:
5 of 5 Another Home Run. August 10, 2022
Reviewer: Mitch Handke from McAllen Texas  
I love these kits as much as I love the ones for my colt 1911 22s.  Great work.  Was wondering if you would ever consider putting them out in other colors.  I'm assuming that they are aluminum and if so, I'm going to try giving one a paint job.

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